Alert archive / Texas / Severe Thunderstorm Watches in 2021
Severe Thunderstorm Watch 240
The Storm Prediction Center issued this severe thunderstorm watch at Jun 6, 2021, 9:42 PM CDT for 28 counties in Texas. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Jun 6, 2021, 9:42 PM CDT (02:42 UTC)
- Expired
- Jun 7, 2021, 4:00 AM CDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 1.5 in
- Strongest gust expected
- 60 kt
All 28 counties
Armstrong County, TX, Briscoe County, TX, Carson County, TX, Castro County, TX, Childress County, TX, Collingsworth County, TX, Cottle County, TX, Crosby County, TX, Dickens County, TX, Donley County, TX, Floyd County, TX, Garza County, TX, Gray County, TX, Hale County, TX, Hall County, TX, Hockley County, TX, Kent County, TX, King County, TX, Lamb County, TX, Lubbock County, TX, Lynn County, TX, Motley County, TX, Potter County, TX, Randall County, TX, Stonewall County, TX, Swisher County, TX, Terry County, TX, Wheeler County, TX
The radar
The Amarillo radar (KAMA), 100 km from the middle of the area, began a volume at 02:44 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
What SPC expected
The probabilities SPC published with the watch, for the watch area over its life.
- Two or more tornadoes
- 10%
- One or more EF2 to EF5 tornadoes
- 2%
- Ten or more severe wind reports
- 40%
- One or more gusts of 65 knots or more
- 20%
- Ten or more severe hail reports
- 30%
- One or more hailstones of 2 inches or more
- 20%
- Six or more combined severe hail and wind reports
- 70%
Warnings issued inside it
11 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 6, 10:14 PM CDT | Severe Thunderstorm Warning | AMA | Randall | 30 min |
| Jun 6, 10:18 PM CDT | Severe Thunderstorm Warning | LUB | Castro, Swisher | 42 min |
| Jun 6, 10:21 PM CDT | Severe Thunderstorm Warning | LUB | Castro, Hale, Lamb, Swisher | 39 min |
| Jun 6, 10:59 PM CDT | Severe Thunderstorm Warning | LUB | Castro, Hale, Lamb, Swisher | 61 min |
| Jun 6, 11:19 PM CDT | Severe Thunderstorm Warning | LUB | Lynn, Terry | 56 min |
| Jun 6, 11:45 PM CDT | Severe Thunderstorm Warning | LUB | Briscoe, Floyd, Hale, Swisher | 60 min |
| Jun 7, 12:15 AM CDT | Severe Thunderstorm Warning | LUB | Garza, Lynn | 60 min |
| Jun 7, 12:43 AM CDT | Severe Thunderstorm Warning | LUB | Briscoe, Crosby, Dickens, Floyd, Hale, Hall and 1 more | 48 min |
| Jun 7, 1:53 AM CDT | Severe Thunderstorm Warning | LUB | Dickens | 43 min |
| Jun 7, 2:28 AM CDT | Severe Thunderstorm Warning | LUB | King | 62 min |
| Jun 7, 3:01 AM CDT | Severe Thunderstorm Warning | LUB | Stonewall | 44 min |
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
The nearest sounding before it
Amarillo Airport, TX (KAMA), launched 00:00Z, 2.7 hours before the alert went out and 100 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 1369 J/kg
- Mixed-layer CIN
- -59 J/kg
- Mixed-layer LCL
- 2265 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- 37 m²/s²
- 0-3 km storm-relative helicity
- 230 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 11.2
The text
As transmitted.
740 WWUS20 KWNS 070240 SEL0 SPC WW 070240 TXZ000-070800- URGENT - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Watch Number 240 NWS Storm Prediction Center Norman OK 940 PM CDT Sun Jun 6 2021 The NWS Storm Prediction Center has issued a * Severe Thunderstorm Watch for portions of The southern Texas Panhandle and South Plains * Effective this Sunday night and Monday morning from 940 PM until 300 AM CDT. * Primary threats include... Scattered damaging wind gusts to 70 mph possible Isolated large hail events to 1.5 inches in diameter possible SUMMARY...Thunderstorms are developing rapidly with the collision of outflow from New Mexico and the retreating dryline, and storms are expected to persist as line segments or clusters into the overnight hours while spreading east-southeastward. Damaging winds and large hail will be possible with the stronger embedded storms. The severe thunderstorm watch area is approximately along and 65 statute miles east and west of a line from 35 miles northeast of Amarillo TX to 60 miles southeast of Lubbock TX. For a complete depiction of the watch see the associated watch outline update (WOUS64 KWNS WOU0). PRECAUTIONARY/PREPAREDNESS ACTIONS... REMEMBER...A Severe Thunderstorm Watch means conditions are favorable for severe thunderstorms in and close to the watch area. Persons in these areas should be on the lookout for threatening weather conditions and listen for later statements and possible warnings. Severe thunderstorms can and occasionally do produce tornadoes. && AVIATION...A few severe thunderstorms with hail surface and aloft to 1.5 inches. Extreme turbulence and surface wind gusts to 60 knots. A few cumulonimbi with maximum tops to 550. Mean storm motion vector 28025. ...Thompson
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 6, 8:49 PM CDT | Mesoscale Discussion | SPC | Armstrong, Briscoe, Carson, Castro, Crosby, Dawson and 14 more | 116 min |
| Jun 6, 11:47 PM CDT | Mesoscale Discussion | SPC | Briscoe, Cottle, Crosby, Dickens, Floyd, Garza and 8 more | 88 min |
| Jun 7, 1:37 AM CDT | Mesoscale Discussion | SPC | Archer, Baylor, Callahan, Childress, Coleman, Cottle and 20 more | 83 min |
| Jun 7, 2:48 AM CDT | Severe Thunderstorm Watch | SPC | Archer, Baylor, Callahan, Clay, Cooke, Denton and 17 more | 7 hr |
| Jun 7, 4:12 AM CDT | Mesoscale Discussion | SPC | Archer, Baylor, Clay, Foard, Hardeman, Haskell and 12 more | 93 min |
| Jun 7, 7:19 AM CDT | Mesoscale Discussion | SPC | Callahan, Comanche, Eastland, Erath, Hood, Johnson and 3 more | 116 min |
| Jun 7, 9:36 AM CDT | Mesoscale Discussion | SPC | Anderson, Angelina, Bosque, Cherokee, Ellis, Falls and 16 more | 2 hr |
| Jun 7, 12:32 PM CDT | Severe Thunderstorm Watch | SPC | Angelina, Bowie, Camp, Cass, Cherokee, Franklin and 24 more | 6 hr |
| Jun 7, 3:08 PM CDT | Mesoscale Discussion | SPC | Sabine, San Augustine, Shelby | 2 hr |
Nearby
Severe Thunderstorm Watches in Texas, 2021Every severe thunderstorm watch in 2021
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.